Honing seamless steel pipes produced by undergo cold forcing and annealing for a cured tensile strength reaching over 52kg/cm2, before the pipes are milled by precision machinery, regulation the tolerance in inner diameter at an H8-H9 level, with surface roughness at between Ra 0.2 μm~0.8μm, which helps to extend the life cycle of the cylinder, and reduces the wear and tear of the seal. The maximum inner diameter of the cylinders produced by our factory reaches 1000mm, with maximum buffing reaching ID length 13000mm.
1. Internal diameter accuracy: H7-H8. 2. Internal roughness: Ra 0.2μm ~ Ra 0.8m. 3. Standard length: 3M- 6M. 4. Special length: 10M. 5. Internal diameter: 18Ø ~ 400Ø. 6. Material: JIS STKM 13C or mechanical construction use carbon steel pipes. (Other specifications can be made customer request based on)